De-adhesion by the growth of penny-shaped bubbles in an adhesive layer

Publisher Website
Google Scholar
Abstract
The separation of two parallel rigid plates sandwiching a thin viscous adhesive layer can be accelerated by the presence of bubbles in the adhesive layer. As plates move apart the bubbles grow rapidly in the lateral direction; upon coalescence complete de-adhesion occurs. In this paper, the rate of growth of the bubbles in response to a tensile stress is analysed in detail. Hot-pressed ceramics such as silicon nitride which are known to contain a viscous glassy phase in the grain boundaries fracture intergranularly at elevated temperature. Growth of pennyshaped bubbles in the boundaries could be one of the mechanisms of fracture in these ceramics.

This publication has 2 references indexed in Scilit: